refractor
Newfoundland and Labrador Health and Community Services Archive and Museum
Tous droits réservés.
| Nom de l'objet : | refractor |
| Type de l'objet : | eye |
| Classification de l'objet : | man-made artifact |
| Catégorie de l'objet : | tools & equipment for science & technology |
| Sous-catégorie de l'objet : | medical & psychological tools & equipment |
| Discipline : | medicine |
| Matériaux : | metal plastic glass paint |
| Technique de fabrication : | moulded printed screwed cast |
| Numéro de catalogue : | 2006.017.01 |
| Fabricant : | Clement Clarke |
| Province d'origine : | Greater London |
| Pays d'origine : | England |
| Continent d'origine : | Europe |
| Province d'utilisation : | Newfoundland and Labrador |
| Pays d'utilisation : | Canada |
| Culture : | English |
| Secteur géo-culturel : | European |
| Contexte culturel : | health care vision diagnosis |
| Date de fin de production : | 1970s |
| Période : | second half of 20th century |
| Description : | The eye refractor is a T-shaped metal machine. The large base has seven dials and 10 switches, each controlling different settings on the machine. The top of the machine is made of two identical (mirror image) pieces, each of which takes measurements from one eye. Knobs on these pieces allow setting adjustment and measurement. The transistor of the machine is a grey metal box with a metal switch, a red light, and a black button on the front, and a square handle on the top. It sits on four small feet. |
| Commentaires : | The donor and history of this eye refractor are unknown. The lens and cornea of the eye in a patient with a refractive error do not correctly bend light entering the eye, and thus the light is not properly focused on the retina. This results in an unfocused, or blurry, image. The optometrist would have adjusted the settings on the refractor to find the combination of settings needed to compensate for the patient's refractive error. This would tell the optometrist what prescription of eyeglasses was needed. |
| Fonctions : | The eye refractor was used for measuring the nature and degree of refractive errors of each eye to provide prescriptions for corrective lenses. |
| Hauteur : | 39.5 (main body); 15.5 (transformer) |
| Longueur : | 48 (main body); 14.5 (transformer) |
| Largeur : | 38 (main body); 14.5 (transformer) |
| Unité de mesure linéaire : | cm |
| Nombre d'objets : | 1 |
| Nombre de parties composantes : | 3 |
| Nom des parties composantes : | machine transformer cord |
| Étiquette ou poinçon : | [on transformer] Transformer No. TRX 680/1 cyclo [on machine] [near a switch] Rapid Var Auto-flashing No 2071-2226 Clement Clarke Made in England [near a switch] Sim Alt [near a dial] H.B. Slow Fast [near a switch] off on [near a switch] normal reverse [near a dial] Out Auto Flash Both R L Normal R L After Image [near a switch] H.B. Light Normal [near a switch] Normal Reverse [near a dial] H.B. Slow Fast Clement Clarke London No 2051-1107 Made in England [near a switch] Normal H.B Light [near a switch] off on [near a dial] hyper R L [where cord from transformer plugs into machine] Low Voltage Connect to Transformer No TRX 680-1 |
| Établissement : | Newfoundland and Labrador Health and Community Services Archive and Museum |
| Ville de l'établissement : | St. John's |
| Province de l'établissement : | Newfoundland and Labrador |
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